It's been a slow countdown to a "Firefly" reunion special ever since Science channel began airing episodes of the cult hit a few years ago. Mark your calendars, Browncoats, because the big event takes place Nov. 11.

"Firefly" told the story of Capt. Mal Reynolds (Fillion) and the crew of Serenity, a Firefly-class spaceship, and their adventures in space in the year 2517. It lasted just 14 episodes, but spawned a movie, "Serenity," comics and a legion of rabid fans.

The 10th anniversary special airs at 9 p.m. CT Nov. 11, after an all-day marathon of the show beginning at 6 a.m. The Science announcement is below:

After months of intense buzz and two blockbuster panels at both San Diego and New York Comic-Con, it's finally time for the main event &#8211; FIREFLY: BROWNCOATS UNITE on November 11 at 10 PM (ET/PT), Science Channel reunites Joss Whedon, Nathan Fillion and the entire renegade crew of the Serenity for the first time ever to provide the complete oral history on the franchise that continues to explode in popularity - despite meeting its end a decade ago. The 60-minute special includes secrets from the set, exclusive cast interviews, and footage from this year's colossal Comic-Con panel that dominated the pop culture conversation. Joining Whedon and Fillion for FIREFLY: BROWNCOATS UNITE are Serenity crewmembers Sean Maher, Summer Glau, Adam Baldwin, Morena Baccarin, Alan Tudyk, Gina Torres and Jewel Staite; along with executive producer Tim Minear and executive story editor Jose Molina.

This summer, FIREFLY creator Joss Whedon triumphantly exclaimed to a crowd of thousands at San Diego Comic-Con that "the story is alive." Legions of fans across the world couldn't agree more, proving that a series which is comprised of only 14 episodes had endured the test of time. Guided by Entertainment Weekly senior writer Jeff Jensen, Science Channel re-created the set of the Serenity for this epic gathering capturing the insights and memories of space's most-rebellious flight crew - including the moment they realized they were canceled and where they believe the FIREFLY universe could live next.

"When Science Channel began airing FIREFLY in 2011, we immediately realized that these fans are a subculture united by a unique and fanatical passion for the series," says Debbie Adler Myers, general manager and executive vice president of Science Channel. "Our goal is to present them the series they love - but in a totally new and surprising way. Whether that's through exploring the science behind the show or reuniting the entire cast for the first time, we want Science Channel to be the home for Browncoats everywhere."

Science Channel's FIREFLY Saturday extravaganza begins at 7AM ET/PT with an all-day marathon of the series. Then, at 10PM ET/PT, the event Browncoats everywhere have been waiting for - FIREFLY: BROWNCOATS UNITE premieres on Science Channel.

FIREFLY the series is set in the year 2517, in a new star system and follows the adventures of the ragtag crew of Serenity, a "Firefly-class" spaceship. The ensemble cast depicts nine distinct characters who, have all banded together for very different reasons. Led by Captain Mal Reynolds (Fillion), who fought on the losing side of a civil war, viewers engage with characters who, are now living on the outskirts of society.

FIREFLY: BROWNCOATS UNITE is produced by Science Channel. Debbie Myers is general manager and executive vice president of Science Channel. Bernadette McDaid is vice president of production and Kaitlin McIntyre is producer for Science Channel.